Geometry:  Point Set

Page Description
5000points Test minimum requirement of 5000 points per PointSet. 5000 points are used to draw a cube grid using the same color for each side (red) to paint all the points in the PointSet.
mixcolors Test multiple colors. A set of multicolor stars are drawn in the local coordinate system. The number of points in the Color node is exactly the same as the number of coordinates in the coord field.
morecolors Test more colors than points. A cube grid using the same color (red) to paint all the points in the PointSet. The number of points in the Color node is higher than the number of coordinates in the coord field.
samecolor Test same number of colors as points. A cube grid using the same color (red) to paint all the points in the PointSet. The number of points in the Color node is exactly the same as the number of coordinates in the coord field.

http://www.web3d.org/x3d/content/examples/ConformanceNist/Geometry/PointSet